Norway450

Goes through gears when turning key

29 posts in this topic

P1799 Actual position of turning angle sensor

P2408 Transmission: Incremental sensor

 

 

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Some disagreement between the two sensors. 

Check wiring again using my method. 

 

Remove and check smoothness of shift drum turning angle sensor using a multimeter set to read Ohms. 

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I'll check them again, and also the circuitry connected to the angle sensor (ADC).

The angle sensor is new, and smooth.

 

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Posted (edited) · Report post

I connected a oscilloscope directly to the inputs of the gear sensor on the ECU, see video below.

First I turn the key, and it goes up the gears and back to neutral. Then I drive until I reach 6th gear.

 

 

The voltages seems stable, sane and correspond to the current gear.

They also agree with the raw sensor values read from "1721 Raw value B43 (Gear position sensor)".

R: 4765 mV

N: 4384 mV

1: 4018 mV

2: 3426 mV

 

However, the values read from "18161 Value of turning angle sensor" seem to not correspond.

R: 207

N: 129

1: 54

2: 232 (sudden jump in the opposite direction? 8bit wrap-around?)

 

Can someone please post their values from these 2 monitors at each gear position so I can compare?

 

Also, a gear teach in ends with an error.

 

Summary: Sensor, wires and analog to digital converter seems to work, numbers are being garbled in the ECU program.
 

 

 

 

 

ecu.jpg

Edited by Norway450

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